/*---------------------------------------------------------------------------*
  Project:  NitroSDK - GX - demos - UnitTours/2D_CharBg_9
  File:     main.c

  Copyright 2003,2004 Nintendo.  All rights reserved.

  These coded instructions, statements, and computer programs contain
  proprietary information of Nintendo of America Inc. and/or Nintendo
  Company Ltd., and are protected by Federal copyright law.  They may
  not be disclosed to third parties or copied or duplicated in any form,
  in whole or in part, without the prior written consent of Nintendo.

  $Log: main.c,v $
  Revision 1.24  2004/11/02 09:35:17  takano_makoto
  fix typo.

  Revision 1.23  2004/05/24 10:30:13  takano_makoto
  fixed autotest code

  Revision 1.22  2004/04/07 01:23:27  yada
  fixed header comment

  Revision 1.21  2004/04/06 12:48:06  yada
  fixed header comment

  Revision 1.20  2004/02/24 05:25:21  yasu
  used OS_EnableIrqMask instead of OS_SetIrqMask

  Revision 1.19  2004/02/09 01:44:47  kitani_toshikazu
  added default setting codes for auto testing.

  Revision 1.18  2004/02/05 07:09:02  yasu
  changed SDK prefix iris -> nitro

  Revision 1.17  2004/02/05 01:15:24  kitani_toshikazu
  added codes for autoTesing.

  Revision 1.16  2004/01/19 02:15:56  nishida_kenji
  fixed comments

  Revision 1.15  2004/01/18 09:20:26  nishida_kenji
  added DEMOStartDisplay

  Revision 1.14  2004/01/18 07:12:43  nishida_kenji
  changed the place of SVC_WaitVBlankIntr

  Revision 1.13  2004/01/09 12:02:34  nishida_kenji
  used OS_SetIrqCheckFlag at VBlankIntr()

  Revision 1.12  2004/01/07 09:38:05  nishida_kenji
  revised comments

  Revision 1.11  2003/12/25 11:00:09  nishida_kenji
  converted by GX_APIChangeFrom031212-2.pl

  Revision 1.10  2003/12/17 11:35:17  nishida_kenji
  used DC_FlushRange

  Revision 1.9  2003/12/17 09:00:20  nishida_kenji
  Totally revised APIs.
  build/buildtools/GX_APIChangeFrom031212.pl would help you change your program to some extent.
  $NoKeywords: $
 *---------------------------------------------------------------------------*/

//---------------------------------------------------------------------------
// A sample that controls brightness:
//
// USAGE:
//   UP, DOWN: Controls brightness
//
// HOWTO:
// 1. Set up the character/palette/screen data same as 2D_CharBG_1.
// 2. Specify the planes and brightness by G2_SetBlendBrightness().
// 3. You can also control brightness by G2_ChangeBlendBrightness().
//---------------------------------------------------------------------------

#include <nitro.h>
#include "DEMO.h"
#include "data.h"

void NitroMain(void)
{
    int evy = 0;

    //---------------------------------------------------------------------------
    // Initialize:
    // They enable IRQ interrupts, initialize VRAM, and set BG #0 for text mode.
    //---------------------------------------------------------------------------
    DEMOInitCommon();
    DEMOInitVRAM();
    DEMOInitDisplayBG0Only();

    //---------------------------------------------------------------------------
    // Transmitting the character data and the palette data
    //---------------------------------------------------------------------------
    GX_LoadBG0Char(d_yuuyake_schDT, 0, sizeof(d_yuuyake_schDT));
    GX_LoadBGPltt(d_yuuyake_sclDT, 0, sizeof(d_yuuyake_sclDT));
    
    //---------------------------------------------------------------------------
    // Transmitting the screen data
    //---------------------------------------------------------------------------
    GX_LoadBG0Scr(d_yuuyake_sscDT, 0, sizeof(d_yuuyake_sscDT));

    //---------------------------------------------------------------------------
    // Setting up brightness control
    //
    // Specify planes and brightness(-16...+16)
    //---------------------------------------------------------------------------
    G2_SetBlendBrightness(GX_BLEND_PLANEMASK_BG0, 0);

    DEMOStartDisplay();
    //---------------------------------------------------------------------------
    // Main Loop
    //---------------------------------------------------------------------------
    while (1)
    {
        DEMOReadKey();
        
        if (DEMO_IS_PRESS(PAD_KEY_UP))
            evy++;
        if (DEMO_IS_PRESS(PAD_KEY_DOWN))
            evy--;

        if (evy < -16)
            evy = -16;
        if (evy > 16)
            evy = 16;
                
        #ifdef SDK_AUTOTEST
        evy = 8;// default params for testing.
        GX_SetBankForLCDC( GX_VRAM_LCDC_C );
        EXT_TestSetVRAMForScreenShot( GX_VRAM_LCDC_C );
        EXT_TestScreenShot( 100, 0x44F02A2A );
        EXT_TestTickCounter();
        #endif //SDK_AUTOTEST
        
        SVC_WaitVBlankIntr();                              // Waiting for the end of V-Blank interrupt

        //---------------------------------------------------------------------------
        // Change the coefficient for brightness
        //---------------------------------------------------------------------------
        G2_ChangeBlendBrightness(evy);
    }
}

//---------------------------------------------------------------------------
// V-Blank interrupt function:
//
// Interrupt handlers are registered on the interrupt table by OS_SetIRQFunction.
// OS_EnableIrqMask selects IRQ interrupts to enable, and
// OS_EnableIrq enables IRQ interrupts.
// Notice that you have to call 'OS_SetIrqCheckFlag' to check a V-Blank interrupt.
//---------------------------------------------------------------------------
void VBlankIntr(void)
{
    OS_SetIrqCheckFlag( OS_IE_V_BLANK );                   // checking V-Blank interrupt
}
